Key-gage.



B. LURIE.

KEY GAGE.

APPLICATION men 0cT.1e,1911.

1,979,384. PatentedSept. 17,1918.

WITNESSES I INVENTOR 3837 Bernard Lui'z'e MUM MW WW I Q} A TTOR/VE Y8 can Warren srA'rES PATENT oi rron,

. BERNARD LURIE, OF- NEW YORK; N L Y. i

KEY-GAGE To all whom it may concern."

' Be it'known that I, BERNARD LURIE, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county of New York and State of New. York, have invented anew and Improved Key-Gage of which the following is a full, clear, and exact description.

Theinvention relates to gages used in duplicating keys for pin tumbler cylinder locks. I I

The object of the invention is to provide a new and improved key gage arranged to permit a locksmith or other person to quickly and accurately gage duplicate keys. In order to produce the desired result, use is made of a'row of adjustable gaging mem bers, a movable key support adapted to .sup port a key having cuttings to be gaged, and a row of setting members bodily 'movable with the said key support and adapted'to engage the said cuttings and toregister with the said gaging members. i I A practical embodiment of the invention is represented in the accompanying drawings forming a partof this specification, in which similar characters ofreference indicate corresponding parts in all theviews.

* Figure 1 is a front elevation of the key gage with a portion of the 'key support broken out and'a part: shown in section; I

Fig. 2 is "a transverse section of th'e'sam'e onthe'line 2'2' of Fig. 1 and showing the parts ingagin'gposition; I l I I Fig- 3 isza similar View of the same and showing the parts-in setting position [and with the key to be 'gaged removed, I

Fig. 4 is a sectional plan view of the same on the line H of Fig. 1; f t Fig.5 is a perspective view of the adjust able member of the key guideway; and Fig.6 is a perspective view of the clamping'nut of one ofthe clamping bolts.

The key gage ismo'untedfon a suitably constructedframe 10 provided with a top bar 11 in which screw. vertically disposed gaging screws 12 arranged ina longitudinalfrow. On the frame"10'below the .gagingscrews 12 ismounted to slide transversely a key support 13 provided. with av longitudinally extending guideway. 14 adapted tofsuppo'rt the shank of the key 15,. the- -cuttings 16 of whichjare to be gaged. 'The. guideway 14i's provided with" an adjus'tablemember 20 to permit of adj listing the guideway for keys having' shanks of diiferentthiclmesst For Specification of Letters Patent.

; Patented Sept; 1a, 1918;

I Application filed October 16, 1517;. Serial No. 196,890. I

the purpose mentioned the member 20; is provided withtransverse pins 21 mounted to slide in the main part of the key support 13 and inthe latter screws a screw 22 extending through the adjustable member 20 and having a head 23 abutting against the outer face of the saidadjustable member 20; By turning the head 23 of'the screw 22 the movable" member 20 can be readily adjusted in a transverse directionto narrow or widen the guideway 14: for keys of different thickness.

v The cuttings 16 of the key 15 are adapted to be engaged at their bottoms by knife edges25" formed on the lower ends of setting pins 26 provided at their upper ends with heads 27 adapted to. register at their upper faces with the bottoms of'the gaging screws.

12, as will be readily understood by reference to Figs.- 1 and 2. vThe setting pins 26 are mounted to slide up 'and d o wn in bear ings 30' each bearing having a rearwardly extending integral arm 31 mounted to swing laterally on a pivot pin 32 and held removably ina corresponding recess 33 formed .in the top of the key support 13. By the 'ar' rangement described each'bearing 30 can be readily swung sidewise so 'as to properly adjust the corresponding sliding pin 26 relative to the bottomof the corresponding cuttingf16 After the bearings 30 have been adjusted according to the cuttings '16 of the key to begaged'atthe'time, the arm 31 of each bearing is fastened in place byJ-the use of a clamping bolt 35 engaging the arm '31 intermediate the bearing'30 and its pivot 32. The bolt 35 extends through a'longitudinal slot 36 forined'in thetop of the key support ing. The head of the bolt 3,5 is provided with the usual slot for the application of 'a screw driver to permit of conveniently turning the bolt with a view to loosen the corresponding arm31 for adjusting the same and to draw the clamping nut'I37 tight afterthe adjustment is made ,tdsecdrelyfaSten the clamping arm .31 in the adjusted position. By the arrangement described the setting pins 26'can be 'readily'adjus'ted sidewiseto correctly engage. their knife edges 25 with the bottoms of the cuttings 16 of the key .15 to be gaged'at the'time." By reference to the drawings it'will be noticed that six setting pins 26 and a corresponding number of gaging screws 12 are shown, as most keys have five or six cuttings, but more setting pins engaging screws 12 may be used for keys having more than six cuttings. If a key has only five cuttings the last bearing 30- to the left is swung sidewise to the left to move its setting pin 26 out of reach of the end of the key so as not to interfere with the proper gaging of the cuttings 16 in this particular key. 4

The forward novement of the'key support 13 is limited by a screw 40 screwing into the back of the key support 13 and slidingly engaging a bracket 41 attached to the back of the frame 10 and projecting into the path of the key support 13 to limit the rearward movement thereof with a view to move the setting pins 26 into vertical alinement with the gaging screws 12, as will be readily understood by reference to Fig. 2. It is understood that the head 42 of the screw 40 abuts against the back of the bracket 41 on shifting the key support 13 into forward position thus limiting the forward movement of the key support 13 (see Fig. 3). In order to prevent accidental upward movement of the key support 13 use is made ofa screw 43 screwing in the bottom of the key support 13 and extending through a slot 44 formed in the base of the frame 10. The head 45 engages the under side of the base and thus limits the upward movement of the key support 13.

In using'the key gage the locksmith or other operator pushes the key support 13 into the forward position shown in Fig. 3 and then inserts the key to be duplicated into the guideway 14 until the bottoms of the stop lugs 50 of the key abut against the right-hand end of the adjustable member 20 of the guideway 14 (see Fig. 1). On inserting thekey 15 the knife edges 25 of the setting pins 26 drop intothe bottoms of the cuttings 16, as shown in Fig. 1. The key support 13 is now moved into rearmost position and then the gage screws 12 are screwed down until their bottoms rest on the tops of the heads 27 of the several setting pins 26 engaging the cuttings 16 at the time (see Figs. 1 and 2). When this has been done the key support 13 is moved forward to its forward position and then the key 15 is withdrawn from the guideway 14. A duplicate key is now made from a blank'with the cuttings 16 of approximately the same depth as the cuttings of the original key, and then the locksmith or other. operator inserts this duplicate key in the guideway 14 so that the knife edges 25 of the setting pins 26 engage the cuttings 16 of this duplicate key. The key support .13 is now moved rearwardly and the locksmith or other operator can now readily see which of the cuttings 16 are correctly madeand which are not by observing the position of the tops of the heads 27 with the lower ends of the corresponding gaging screws 12. It will he noticed that when the key support 13 is moved rearwardly the heads 27 of the setting key support 13 is moved back into forward position and then the duplicate key is withdrawn from the guideway 14, after which the operator deepens the cuttings that need further deepening. The duplicate key is then reinserted in the guideway 14 and the above described operation is repeated as many times as are necessary and until the key support 13 can be moved into extreme rearmost position with the tops of the heads 27 for the setting pins 26' fitting under the bottoms of the'gaging screws 12.

It will be noticed thatby the arrangement described the locksmith or other operator is enabled to readily gage the cuttings 16 of the duplicate keys to allow the locksmith or operator to reproduce the cuttings of' the duplicate keys to accurately correspond to the cuttings of the original key.

The key gage shown and described is very simple and durable in construction and is not liable to get easily out of order. 7

Having thus described my invention, I claim as newand desire to secure by Let-. ters Patentz 1. A key gage, comprising a row ofadjustable gaging members, a key support laterally movable with respect to the row of gaging members and adapted to support a key having cuttings to be gaged, and a row of setting members bodily movable withv the said key support and adapted to engage the said cuttings and to register with the said gaging members.

.2. A key gage, comprising a row of gaging screws, a key support having a guideway for the insertion of a key to be gaged, a row of slidable setting pins on the key support and adapted to engage the cuttings of the key and to register with the said gaging screws.

3. A key gage, comprising a row of ad justable gaging members, a key support laterally movable with respect to the row of gaging members and adapted to support a. key having cuttings to be gaged, and a row of setting pins slidable loosely on the key support andadapted to engage the said cuttings, the said pins being adapted to register with the said gaging members.

4. A key gage, comprising a frame, a row the operator has made his observations the of gaging screws mounted in the said frame, a key support slidable on the said frame and provided with a guideway adapted to support a key having cuttings to be gaged, and a row of setting pins slidable in the said key support and adapted to engage at one end with the said cuttings, the other ends of the said pins being adapted to register with the said gaging screws in one position of the key support.

5. A key gage, comprising a row of adjustable gaging members, a key support laterally movable with respect to the row of gaging members and adapted to support a key having cuttings to be gaged, bearings adjustably mounted on the said key support, and setting pins slidable in the said bearings and adapted to be seated in the said outtings, the said setting pins being adapted to be moved into register with the said gaging members on shifting the said key support.

6. A key gage, comprising a row of adjustable gaging members, a key support laterally 'movable with respect to the row of gaging members and adapted to support a key having cuttings to be gaged, bearings provided with arms pivoted for adjustment on the said key support, means to secure the said arms in place on the key support, and setting pins slidable in the said bearing and adapted to be seated in the said cuttings, the said setting pins being adapted to register with the said gaging members on shifting the said key support.

7. A key gage, comprising a frame, a row of vertical gaging screws screwing in ting pins having heads and slidable in the said bearings, the pin heads bein adapted to rest on the said bearings and being adapted to move in register with the said gaging screws, the lower ends of the pins being adapted to be seated in the said cuttings.

8. A key gage, comprising .a frame, a row of vertical gaglng screws screwing in the said frame, a key support slidable transversely to the row' of gaging screws on the said frame and provided with a guideway for the reception of a key having cuttings to be gaged, the said guideway being formed in part by an adjustable member to adjust the width of the guideway for keys of difi'erent' thickness, a row of vertical bearings having arms pivoted for adjustment on the. said key support, means for fastening the said bear-' ing arms in place on the key support for adj ustment, and setting pins having heads and slidable in the said bearings, the pin heads being adapted to rest on the said bearings and being adapted'to move in register with the said gaging screws, the lower ends of the pins being adapted to be seated in the said cuttings. 1

BERNARD LURIE.

Copies of this patent may be obtained for five cents eaeh,'by addressing the commissioner of Patents,

Washington, D. 0. 

